Nightmare street of film (3)
I believe the answer is:
elm
'nightmare street of film' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elm that I've seen before include "Deciduous tree with light serrated leaves" , "Source of wood" , "Tough timber" , "Tree for a Cockney tiller" , "Kind of 19" .)